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Re: [GIT PULL] x86 setup: correct booting on 486 (revised)

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From: H. Peter Anvin <hpa@...>
To: Linus Torvalds <torvalds@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>, Thomas Gleixner <tglx@...>, Ingo Molnar <mingo@...>, Mikael Petterson <mikpe@...>, Eric Biederman <ebiederm@...>, Jeremy Fitzhardinge <jeremy@...>
Subject: Re: [GIT PULL] x86 setup: correct booting on 486 (revised)
Date: Monday, November 5, 2007 - 2:32 pm

Linus Torvalds wrote:

Well, the 32-bit code needs to set up its own stack, and only it knows 
where it wants its stack; we don't guarantee that the stack is valid 
when we enter the 32-bit code and we're entering with both INT and NMI 
disabled (requiring a stack would probably break all existing users of 
the 32-bit entrypoint.)

However, that being said, doing so is trivial, and it might help some 
debugging hack; anything that makes debugging easier is a Good Thing[TM].

	-hpa
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Messages in current thread:
[GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Sun Nov 4, 10:16 pm)
[GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Sun Nov 4, 11:58 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Linus Torvalds, (Mon Nov 5, 1:15 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 1:56 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Linus Torvalds, (Mon Nov 5, 2:12 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 2:32 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Linus Torvalds, (Mon Nov 5, 2:36 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Mon Nov 5, 4:21 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 4:31 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Mon Nov 5, 5:14 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 5:28 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Mon Nov 5, 5:58 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Jeremy Fitzhardinge, (Mon Nov 5, 4:51 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 5:06 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Jeremy Fitzhardinge, (Mon Nov 5, 8:59 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 9:11 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Jeremy Fitzhardinge, (Mon Nov 5, 9:18 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Mon Nov 5, 9:31 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Jeremy Fitzhardinge, (Tue Nov 6, 12:17 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Tue Nov 6, 12:27 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Tue Nov 6, 1:04 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Jeremy Fitzhardinge, (Tue Nov 6, 12:55 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Tue Nov 6, 1:00 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Tue Nov 6, 1:09 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Tue Nov 6, 1:57 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), Eric W. Biederman, (Tue Nov 6, 2:27 pm)
Re: [GIT PULL] x86 setup: correct booting on 486 (revised), H. Peter Anvin, (Tue Nov 6, 2:41 pm)